Real-time suppression of random phase drift for laser ranging with high-frequency intermode beats  

作　　者：杨睿韬 孙昊 胡鹏程 杨宏兴 付海金 于亮 邢旭 丁雪梅 谭久彬 Ruitao Yang;Hao Sun;Pengcheng Hu;Hongxing Yang;Haijin Fu;Liang Yu;Xu Xing;Xuemei Ding;Jiubin Tan(Center of Ultra-precision Optoelectronic Instrument,Harbin Institute of Technology,Harbin 150080,China;Key Laboratory of Ultra-precision Intelligent Instrumentation(Harbin Institute of Technology),Ministry of Industry and Information Technology,Harbin 150080,China)

机构地区：[1]Center of Ultra-precision Optoelectronic Instrument,Harbin Institute of Technology,Harbin 150080,China [2]Key Laboratory of Ultra-precision Intelligent Instrumentation(Harbin Institute of Technology),Ministry of Industry and Information Technology,Harbin 150080,China

出　　处：《Chinese Optics Letters》2023年第4期21-25,共5页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(NSFC)(Nos.52175501 and 51605120);the Heilongjiang Provincial Natural Science Foundation(No.LH2021E059);the National Key Research and Development Program of China(No.2020YFC2200204)。

摘　　要：Laser ranging with frequency comb intermode beats[IMBs]has been suffering from random phase drifts[RPDs]for two decades.In this study,we reveal the influence of signal transmission path on the RPDs and propose a real-time suppression method using two IMBs of similar frequencies from different combs.As the two IMBs obtain similar RPDs during their transmission through same signal paths,the RPD of the original probing signal IMB is suppressed by deducting the RPD of the newly added local IMB in real time.In our experiments,a real-time suppression of RPDs is achieved using IMBs of 1001 and 1000 MHz.For the sampling time of 100 s,the effect of 19-fold suppression has been achieved.The proposed method provides a new solution for the long-standing phase drift problem in laser ranging with comb IMBs.

关 键 词：intermode beat random phase drift laser ranging 

分 类 号：TN247[电子电信—物理电子学]